Play, by Samuel Beckett, is about three people in urns. What they are doing in these urns, whether they are dead or alive in these urns, and what they discuss in he course of this play are question I can't answer. But if you're a Beckett fan, you might want to investigate them on your own. At the Newbury Street Theatre, 15 Newbury St. in Boston, tonight and tomorrow. Tickets $1.

The Madhouse company of London has been carrying on with its "wild Stunt Show" all summer--it's actually a collection of vaudeville-type skits--and this Sunday you can get in free if you go to the box office between 6:45 and 7 p.m. and present something, anything, of British origin. The Company tried this play once before, and it must have been a success since they're repeating it. But if you ask the woman at the box office what sorts of things people showed up with, she will refuse to tell you "because it might give you ideas." At the Charles Playhouse Cabaret, 76 Warrenton St., Boston, performances at 8 p.m. Thurs., at 7 and 9 Fri. and Sat., and 7:30 Sun. If you're at a loss for British ideas, you can get in for $3.50 or $4.50 Thurs. and Sun., or a dollar more Saturday.